Portion of a shoe upper



FIG. 1 is a side perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a side view thereof; and,

FIG. 3 is a top view thereof.

The uneven broken lines immediately adjacent to the shaded areas form an unclaimed boundary of the design. The broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. The depicted contrast in shading represents a contrast in appearance, for example, by color, texture, and/or material. 

The ornamental design for a portion of a shoe upper, as shown and described. 